<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
    <style>

        html, body {
            padding: 0;
            margin: 0;
        }

        .container {
            width: 98%;
            height: 100%;
            margin: 12px auto;
            display: flex;
            flex-direction: row;
            justify-content: space-between;
        }


        .div1 {
            width: 25%;
            height: 720px;
            display: flex;
            flex-direction: column;
            justify-content: space-between;
        }

        .div1-0 {
            height: 230px;
            background: linear-gradient(to left, #f00, #f00) left top no-repeat,
            linear-gradient(to bottom, #f00, #f00) left top no-repeat,
            linear-gradient(to left, #f00, #f00) right top no-repeat,
            linear-gradient(to bottom, #f00, #f00) right top no-repeat,
            linear-gradient(to left, #f00, #f00) left bottom no-repeat,
            linear-gradient(to bottom, #f00, #f00) left bottom no-repeat,
            linear-gradient(to left, #f00, #f00) right bottom no-repeat,
            linear-gradient(to left, #f00, #f00) right bottom no-repeat;
            background-size: 1px 20px, 20px 1px, 1px 20px, 20px 1px;
        }


        .div2 {
            width: 35%;
            height: 720px;
            background: linear-gradient(to left, #f00, #f00) left top no-repeat,
            linear-gradient(to bottom, #f00, #f00) left top no-repeat,
            linear-gradient(to left, #f00, #f00) right top no-repeat,
            linear-gradient(to bottom, #f00, #f00) right top no-repeat,
            linear-gradient(to left, #f00, #f00) left bottom no-repeat,
            linear-gradient(to bottom, #f00, #f00) left bottom no-repeat,
            linear-gradient(to left, #f00, #f00) right bottom no-repeat,
            linear-gradient(to left, #f00, #f00) right bottom no-repeat;
            background-size: 1px 20px, 20px 1px, 1px 20px, 20px 1px;
        }

        .div3 {
            width: 32%;
            height: 720px;
            background: linear-gradient(to left, #f00, #f00) left top no-repeat,
            linear-gradient(to bottom, #f00, #f00) left top no-repeat,
            linear-gradient(to left, #f00, #f00) right top no-repeat,
            linear-gradient(to bottom, #f00, #f00) right top no-repeat,
            linear-gradient(to left, #f00, #f00) left bottom no-repeat,
            linear-gradient(to bottom, #f00, #f00) left bottom no-repeat,
            linear-gradient(to left, #f00, #f00) right bottom no-repeat,
            linear-gradient(to left, #f00, #f00) right bottom no-repeat;
            background-size: 1px 20px, 20px 1px, 1px 20px, 20px 1px;
        }
    </style>
</head>
<body>
<div class="container">
    <div class="div1">
        <div class="div1-0"></div>
        <div class="div1-0"></div>
        <div class="div1-0"></div>
    </div>
    <div class="div2">

    </div>
    <div class="div3">

    </div>
</div>
</body>
</html>